CVE-2026-57977: Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a n

highCVSS 7.1CVE-2026-57977

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: high — CVSS 7.1
Published: 2026-07-03
Last updated: 2026-07-07
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-57977

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-579770.40% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 32% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-57977	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

high[NEW] [high] Microsoft Edge: Multiple vulnerabilitiescert-bund
highCVE-2026-57977: Microsoft Edge (Chromium-based) Spoofing Vulnerabilitymsrc

Recent advisories for Improper neutralization of

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

unknownCVE-2026-58591: Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerabi…nvd · 2026-07-10
unknownCVE-2026-58588: Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerabi…nvd · 2026-07-10
unknownCVE-2026-58587: Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerabi…nvd · 2026-07-10
unknownCVE-2026-55808: Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerabi…nvd · 2026-07-10
unknownCVE-2026-15085: Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerabi…nvd · 2026-07-10
unknownCVE-2026-15084: Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerabi…nvd · 2026-07-10